Switch from fmtlib to std::format.

[Holt59]

Switch from fmtlib to std::format.

I already updated the modorganizer project to follow these changes, PR to come, but other repositories probably needs to be updated as well.

Some details:

• I removed the custom converters in favor of specialization of std::formatter - There is a specialization to allow using std::basic_string of any char-type with any format string (e.g., std::format("{}", L"Hello World!"). This was done to follow the previous converter behavior, not sure if we want to keep it.
• I added overloads for all logs function that takes std::format_string - This allows for compile-time checking of the format string. In an ideal world, that would be the sole overload, but we have many places with translated format string. I kept the templated F version, but this could probably be replaced with a QStringView/QString overload.

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Note: This supersedes #142